CHM 101 Assignment Questions and Answers

1. CHM 101
2. Department
   Nursing science
3. Assignment Questions
   1. The mass of the nucleus is equal to the mass of the atom, explain
   2.Which particle does not contribute to the overall charge of the atom?

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CHM 101 Assignment

1. The Mass of the Nucleus is Equal to the Mass of the Atom – Explain

The mass of an atom is almost entirely concentrated in its nucleus because the nucleus contains protons and neutrons, which are significantly heavier than electrons.

• Protons and neutrons have nearly the same mass (about 1 atomic mass unit each), while electrons are much lighter (about 1/1836th the mass of a proton).

• Since electrons orbit the nucleus at a distance and have negligible mass, their contribution to the total mass of the atom is insignificant.

• This is why, for practical purposes, the mass of the atom is considered equal to the mass of the nucleus.

2. Which Particle Does Not Contribute to the Overall Charge of the Atom?

The neutron does not contribute to the overall charge of the atom.

• Protons carry a positive charge (+1).

• Electrons carry a negative charge (-1).

• Neutrons are neutral (no charge), meaning they do not affect the atom’s overall electrical charge.

Since neutrons only add to the mass but not the charge, they are responsible for atomic stability rather than influencing the atom’s electric properties.